Tang is a geographic, temporary social media network that allows users to see what others are up to. Users post photos or 10-second videos, and set a time limit to those posts between 2 minutes and 48 hours. From there, they add captions and hashtags and share the post with the world.
Users searching for posts can search via hashtags, by geographic radius, or both. Imagine searching #party within 5km.
via BetaList http://bitly.com/1VLhn6b
by Robert Hughey (Google+)